<template>
  <div ref="wrapper">
    <slot></slot>
  </div>
</template>

<script type="text/ecmascript-6">
import BScroll from "better-scroll";

export default {
  name: "Scroll",
  props: {
    probeType: {
      type: Number,
      default: 1
    },
    click: {
      type: Boolean,
      default: true
    },
    data: {
      type: Array,
      default: null
    },
    listenScroll: {
      type: Boolean,
      default: false
    }
  },
  watch: {
    data() {
      setTimeout(() => {
        this.refresh();
      }, 20);
    }
  },

  mounted() {
    setTimeout(() => {
      this._initScroll();
    }, 20);
  },

  methods: {
    _initScroll() {
      if (!this.$refs.wrapper) return;
      this.scroll = new BScroll(this.$refs.wrapper, {
        click: this.click,
        probeType: this.probeType
      });

      // 监听滚动事件
      if (this.listenScroll) {
        let self = this;
        this.scroll.on("scroll", pos => {
          self.$emit("scroll", pos);
        });
      }
    },
    disable() {
      this.scroll && this.scroll.disable();
    },
    enable() {
      this.scroll && this.scroll.enable();
    },
    refresh() {
      this.scroll && this.scroll.refresh();
    },
    scrollTo() {
      this.scroll && this.scroll.scrollTo.apply(this.scroll, arguments);
    },
    scrollToElement() {
      this.scroll && this.scroll.scrollToElement.apply(this.scroll, arguments);
    }
  }
};
</script>

<style lang="stylus" scoped>
</style>